Here's an exercise that develops speed, agility, balance, coordination and core strength. Tape a ladder-like outline on the ground. Hop.

Sick of the sweaty, fluorescent-lit, loud-music gym scene? Don't want to cough up dough for memberships you'll never be able to cancel short of divine intervention? Try getting fit at the park. Or the beach.

We asked personal trainer Mike Donavanik (www.mikedfitness.com) to show us simple outdoor moves that deliver. Here Donavanik — clients include actors Sara Underwood and Jayson Blair — demonstrates a ladder drill, part of regular training for baseball and football players. All you need is grass or a hard surface plus some duct tape or chalk.